17
2.2.2.3
IP Filter
The IP Filter setting can be found under this path:
System> Security> IP Filter
.
With IP Filter, users can allow or deny specific IP addresses from accessing the
camera.
Enable IP Filter
Check the box to enable the IP Filter function. Once enabled, the listed
IP addresses (IPv4) in the <Filtered IP Addresses> list box will be
allowed / denied to access the camera.
Select <Allow> or <Deny> from the drop-down list and click on the
<Apply> button to determine the IP filter behavior.
Add IP Address
Input IP address at the blank space below the <Filtered IP Address> list
and click <Add>. The newly-added address will be shown in the list. Up
to 256 IP address entries can be specified.
In addition, to filter a group of IP addresses, enter an address at the
blank space followed with a slash and a number ranging from 1 to 31,
e.g. 192.168.2.81/30. The number after the slash can define how many
IP addresses will be filtered. For details, please refer to the following
example.
Example: Filtering a group of consecutive IP addresses
The steps below show what will be filtered when 192.168.2.81/30 is
entered.
Step 1:
Convert 192.168.2.81 to binary numbers. The binary
numbers are 11000000.10101000.00000010.01010001. Users can
refer to
Appendix B: IP Addresses from Decimal to Binary
for
converting the IP addresses to binary numbers. The number
“30”
after the slash is referring to the first 30 digits of the binary numbers.
Step 2:
Convert a few IP addresses before and after 192.168.2.81
to binary numbers. Then compare their first 30 digits with the binary
numbers of 192.168.2.81.